Battle of 18 Scorpii

The Battle of 18 Scorpii was an engagement during the Human-Covenant War. Upon arrival the lone Covenant ship inflicted heavy damage on the Battle Group which was unable to penetrate the Covenant ship's shields. The UNSC Seattle and UNSC Thermopylae sustained only moderate damage, however the UNSC Io was heavily damaged and its Shaw-Fujikawa Translight Engine was rendered inoperable. This gave the commanding Captain the choice of whether to fall back and save two the two destroyers, or fight and possibly lose all three of his ships. Luckily, unknown friendly reinforcements jumped in system and destroyed the Covenant ship, saving the UNSC forces. The lead ship's profile matched a thirty-year-old frigate design with major modifications, which a passive transponder identified as the UNSC Bellerophon.